Animation of the GHRSST global daily AVHRR_OI  sea surface temperature v2.1 dataset  from 2016 to 2020. The dataset was created by the NOAA National Centers for Environmental Information (NCEI) using optimal interpolation (OI) on a global 0.25 degree grid.  It can be accessed from the PO.DAAC Portal at https://podaac.jpl.nasa.gov/dataset/AVHRR_OI-NCEI-L4-GLOB-v2.1 (DOI:10.5067/GHAAO-4BC21).